GSP & Diaz square off at heated weigh-in

UFC president Dana White had to step in and prevent things getting out of hand at the UFC 158 weigh-in on Friday, as Georges St-Pierre and Nick Diaz threatened to get physical 24 hours before their scheduled bout.

After both successfully making weight - champion St-Pierre, at 170 pounds, coming in a pound heavier than the challenger - the two welterweights immediately squared off against one another, with White forced to step in to ensure matters did not escalate any further.

Afterwards, St-Pierre promised to "walk the walk" on Saturday night in Montreal.

"I can talk as much as I want," St-Pierre said. "But tomorrow, I'm gonna walk the walk."

Diaz declined to discuss the confrontation, saying: "I'm gonna get out there and fight. We're gonna see what's gonna happen."

None of the other fighters on the card for the event at the Bell Centre had any difficulty making weight.